The planets : solved and unsolved problems - Martynov, D. I͡A. (Dmitriĭ I͡Akovlevich) (Washington : National Aeronautics and Space Administration ; Springfield, Va. : for sale by the National Technical Information Service, 1972)
Photocopy.
Translation of Planety: reshennyye i nereshennyye problemy.
Includes bibliographical references.
Mode of access: Internet.
Keywords: Planets